TY - JOUR
T1 - Magnetically induced orientation of mesochannels in mesoporous silica films at 30 Tesla
AU - Yamauchi, Yusuke
AU - Sawada, Makoto
AU - Komatsu, Masaki
AU - Sugiyama, Atsushi
AU - Osaka, Tetsuya
AU - Hirota, Noriyuki
AU - Sakka, Yoshio
AU - Kuroda, Kazuyuki
PY - 2007
Y1 - 2007
N2 - We demonstrate the magnetically induced orientation of mesochannels in mesoporous silica films prepared with low-molecular-weight surfactants under an extremely high magnetic field of 30 T. This process is principally applicable to any type of surfactant that has magnetic anisotropy because such a high magnetic field provides sufficient magnetic energy for smooth magnetic orientation. Hexadecyltrimethylammonium bromide (CTAB) and polyoxyethylene-10- cetyl ether (Brij 56) were used as cationic and nonionic surfactants, respectively. According to XRD and cross-sectional TEM, mesochannels aligned perpendicular to the substrates were observed in films prepared with low-molecular-weight surfactants, although the effect was incomplete. The evolution of these types of films should lead to future applications such as highly sensitive chemical sensors and selective separation.
AB - We demonstrate the magnetically induced orientation of mesochannels in mesoporous silica films prepared with low-molecular-weight surfactants under an extremely high magnetic field of 30 T. This process is principally applicable to any type of surfactant that has magnetic anisotropy because such a high magnetic field provides sufficient magnetic energy for smooth magnetic orientation. Hexadecyltrimethylammonium bromide (CTAB) and polyoxyethylene-10- cetyl ether (Brij 56) were used as cationic and nonionic surfactants, respectively. According to XRD and cross-sectional TEM, mesochannels aligned perpendicular to the substrates were observed in films prepared with low-molecular-weight surfactants, although the effect was incomplete. The evolution of these types of films should lead to future applications such as highly sensitive chemical sensors and selective separation.
KW - High magnetic fields
KW - Magnetically induced orientation
KW - Mesoporous materials
KW - Silicates
KW - Thin films
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U2 - 10.1002/asia.200700244
DO - 10.1002/asia.200700244
M3 - Article
C2 - 17939150
AN - SCOPUS:36949015608
SN - 1861-4728
VL - 2
SP - 1505
EP - 1512
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
IS - 12
ER -